CanadaW. J.: Use of Urokon in roentgen study of the gastrointestinal tract. Radiology64 (1955), 867.
2.
DavisL. A.Ku-ChangHuangPirkeyE. L.: Water-soluble non-absorbable radiopaque mediums in gastrointestinal examination. J. A. M. A.160 (1956), 373.
3.
EpsteinB. S.: The use of a water soluble contrast medium (Hypaque) for gastro-intestinal roentgenography. Amer. J. Roentgenology78 (1957), 694.
4.
GipsonE. N.: Preliminary report on the use of oral renografin (Gastrografin) in gastrointestinal studies. A report of 27 cases. Monographs on therapy2 (1957), 242.